/*
 *  Copyright 2015 Alexey Andreev.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.teavm.vm;

import java.util.ArrayList;
import java.util.List;
import org.teavm.interop.PlatformMarker;
import org.teavm.vm.spi.TeaVMPlugin;

public final class TeaVMPluginLoader {
    private TeaVMPluginLoader() {
    }

    public static List<TeaVMPlugin> load(ClassLoader classLoader) {
        if (isBootstrap()) {
            return TeaVMBootstrapPluginLoader.loadPlugins(false);
        } else {
            List<TeaVMPlugin> plugins = new ArrayList<>();
            TeaVMPluginReader.load(classLoader, className -> plugins.add(instantiate(classLoader, className)));
            return plugins;
        }
    }

    @PlatformMarker
    private static boolean isBootstrap() {
        return false;
    }

    private static TeaVMPlugin instantiate(ClassLoader classLoader, String className) {
        try {
            return (TeaVMPlugin) Class.forName(className, true, classLoader).newInstance();
        } catch (ClassNotFoundException | InstantiationException | IllegalAccessException e) {
            throw new IllegalStateException("Can't instantiate plugin " + className, e);
        }
    }
}
